28001128534 has 16 divisors (see below), whose sum is σ = 42765115536. Its totient is φ = 13746895200.

The previous prime is 28001128501. The next prime is 28001128549. The reversal of 28001128534 is 43582110082.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28001128534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131317 + ... + 270640.

It is an arithmetic number, because the mean of its divisors is an integer number (2672819721).

Almost surely, 2^28001128534 is an apocalyptic number.

28001128534 is a deficient number, since it is larger than the sum of its proper divisors (14763987002).

28001128534 is a wasteful number, since it uses less digits than its factorization.

28001128534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402591.

The product of its (nonzero) digits is 15360, while the sum is 34.

The spelling of 28001128534 in words is "twenty-eight billion, one million, one hundred twenty-eight thousand, five hundred thirty-four".